Compressor and air conditioner

Abstract

The present application relates to a kind of compressor and air conditioner, the compressor includes shell and the outer circulation oil circuit extended in the shell outside, the shell is formed with oil pool in the lower cavity portion, oil return cavity structure is provided at the place where the outer circulation oil circuit and the lower cavity portion pass, the oil return cavity structure makes the oil return in the outer circulation oil circuit first pass through the oil return cavity structure before backflow to the oil pool, the oil return cavity structure makes the oil return in the outer circulation oil circuit change and / or speed change and / or from multiple positions flow into the oil pool in the direction of the oil pool.The air conditioner includes compressor.Belong to air conditioner technical field.The present application solves the technical problem that the performance under high oil injection amount state cannot be improved under the condition of the agitation formed by the direct backflow of outer circulation oil return oil circuit.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a compressor and an air conditioner. Background Technology

[0002] With the development of the social economy, the market demand for large compressors is gradually increasing. The two most commonly used compressors in the air conditioning market are scroll compressors and rotary compressors. Scroll compressors have advantages over some large-displacement compressors due to their structural advantages. However, rotary compressors, with their simple structure, low cost, and high reliability, still hold the mainstream market share. Furthermore, rotary compressors have a wide range of applications, including household appliances, commercial equipment, medical cooling systems, and military firefighting.

[0003] Although rotary compressors have significant advantages, they still have certain issues that require further improvement. One such issue is the high oil circulation rate of rotary compressors. This high oil circulation rate can lead to reduced cooling capacity, increased power consumption, and a lower COP. Furthermore, the high oil circulation rate results in poor lubrication of the compressor pump body friction pairs, which can easily cause compressor reliability problems.

[0004] In large rotary compressors, due to their large displacement, there will be oil and gas in the upper chamber of the compressor. Due to the influence of the gas, the more oil and gas accumulate in the upper chamber of the compressor, the more the oil circulation rate of the compressor will increase, affecting the performance and reliability of the compressor.

[0005] In existing technologies, an external oil return pipe is installed to increase the oil return volume and reduce the oil-gas mixture in the upper chamber of the compressor. However, a large amount of oil-gas with a certain velocity returns to the lower chamber, causing agitation in the oil sump, increasing the formation of refrigerant oil droplets and the dissolution of refrigerant and refrigerant oil. Some refrigerant oil, driven by the refrigerant, enters the middle and upper chambers of the compressor from the lower chamber, while some is pumped into the middle and upper chambers by the oil pump, eventually accumulating in the upper chamber to form oil-gas mixture, thus increasing the compressor oil circulation rate.

[0006] There is currently no effective solution to the above problems. Summary of the Invention

[0007] To overcome the problems existing in related technologies, this invention proposes a compressor and an air conditioner.

[0008] The first aspect of this invention provides a compressor, the compressor including a housing and an external circulation oil passage extending outside the housing. The housing forms a cavity, the cavity housing a drive mechanism and a compression mechanism arranged vertically. The cavity includes an upper cavity portion located above the drive mechanism and a lower cavity portion located below the compression mechanism. The external circulation oil passage connects to the upper cavity portion from one end outside the housing and to the lower cavity portion from the other end. The housing forms an oil sump in the lower cavity portion and an exhaust port in the upper cavity portion. A return oil cavity structure is provided at the connection between the external circulation oil passage and the lower cavity portion. The return oil cavity structure causes the return oil in the external circulation oil passage to pass through the return oil cavity structure before returning to the oil sump. The return oil cavity structure changes the direction and / or speed of the return oil in the external circulation oil passage entering the oil sump and / or causes it to flow into the oil sump from multiple locations.

[0009] Further optionally, the oil return cavity structure is an annular cavity structure formed along the circumference of the shell, the annular cavity structure comprising:

[0010] The lower cavity has multiple oil outlets on its wall surface to allow oil to flow out.

[0011] The upper cavity includes a closed portion and a semi-closed portion communicating with the lower cavity; wherein,

[0012] The semi-enclosed part is provided with an opening that connects to the external circulation return oil circuit, and the opening can introduce oil and gas from the external circulation oil circuit into the lower cavity.

[0013] Alternatively, the inner cavity of the semi-enclosed portion may be provided with a multi-channel structure along the downward flow direction of oil and gas.

[0014] Further optionally, the multi-channel structure includes multiple flow channels vertically separated by wall panels within the semi-enclosed cavity.

[0015] Further optionally, a connecting part is provided between the multi-channel structure and the lower cavity, the connecting part including a partition, the partition having a channel opening for introducing oil and gas from the multi-channel structure into the lower cavity.

[0016] Further optionally, the annular cavity structure is provided with a flow-slowing component to reduce the potential energy of oil and gas flow. The flow-slowing component includes a rib plate that divides the lower cavity into several flow-slowing cavities and several flow holes opened on the rib plate.

[0017] In this process, the oil and gas flow along the ribs in several slow-flow chambers and through the flow holes to the next slow-flow chamber, forming a slow flow and / or oil-gas separation for the introduced oil and gas.

[0018] Alternatively, the center points of the plurality of flow holes are sequentially lowered within the annular cavity structure.

[0019] Further optionally, the sealing part is at least one sealed cavity; the number and / or volume of the sealed cavities are increased or decreased to adjust the volume of the oil pool occupied by the oil return cavity structure and change the liquid level of the oil pool.

[0020] Further optionally, the closed cavity is two, including closed cavity A and closed cavity B. Closed cavity A is connected to the semi-closed part, and closed cavity B is disposed opposite to closed cavity A. Two gaps are formed between closed cavity B, closed cavity A and the semi-closed part, so that the bottom of the compression mechanism can be accommodated in the two gaps.

[0021] A second aspect of the present invention provides an air conditioner comprising the compressor described in any of the preceding claims.

[0022] The technical solution of this invention can include the following beneficial effects: By adopting an oil return chamber structure within the external circulation oil return circuit, the flow direction and potential energy of the refrigerant oil when the oil vapor returns to the lower chamber are changed. This reduces the agitation of the refrigerant oil inside the oil sump within a limited space, alleviates the turbulence caused by direct discharge of refrigerant oil into the oil sump, reduces the amount of refrigerant dissolved in the refrigerant oil, and lowers the compressor's oil circulation rate. Simultaneously, by increasing the proportion of the oil return structure in the oil sump through a closed section, the amount of oil injected is reduced while maintaining a constant liquid level. This achieves a reduction in compressor oil circulation rate while reducing oil volume and weight, improving compressor performance and achieving greater energy savings. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] Figure 1 This is a schematic diagram of the oil and gas flow in a partial compressor according to an embodiment of the present invention.

[0025] Figure 2 This is a three-dimensional schematic diagram of the oil return structure according to an embodiment of the present invention.

[0026] Figure 3 This is a top view of the oil return structure according to an embodiment of the present invention.

[0027] Figure 4 This is a planar sectional view of the connection surface between the upper and lower cavities of the oil return structure according to an embodiment of the present invention.

[0028] Figure 5 According to the embodiments of the present invention Figure 3 BB section view.

[0029] Figure 6According to the embodiments of the present invention Figure 4 CC section view.

[0030] Figure 7 This is a bottom view of the oil return structure according to an embodiment of the present invention.

[0031] Figure 8 This is a side view of the oil return structure according to an embodiment of the present invention.

[0032] Figure 9 This is a schematic diagram of the installation method of the oil return structure according to an embodiment of the present invention.

[0033] Figure 10 This is a schematic diagram of the second installation method of the oil return structure according to an embodiment of the present invention.

[0034] in:

[0035] 1. Shell;

[0036] 2. External circulation oil circuit;

[0037] 3. Pump body assembly;

[0038] 4. Oil return cavity structure;

[0039] 41. Upper cavity;

[0040] 411. Enclosed section;

[0041] 412. Semi-enclosed section; 4121. Wall panel; 4122. Circulation channel;

[0042] 42. Lower cavity; 422. Partition; 423. Channel opening; 424. Flow hole; 425. Rib plate; 426. Oil outlet.

[0043] 43. Opening;

[0044] 5. Oil tank. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0046] The technical solution of this embodiment will be described in detail below with reference to the accompanying drawings. In the absence of conflict, the following implementation methods and embodiments can be combined with each other.

[0047] According to an exemplary embodiment, such as Figure 1As shown, this embodiment proposes a compressor, which includes a housing 1 and an external circulation oil passage 2 extending outside the housing 1. The housing 1 forms a cavity, which accommodates a drive mechanism and a compression mechanism arranged vertically. The cavity includes an upper cavity portion located above the drive mechanism and a lower cavity portion located below the compression mechanism.

[0048] The external circulation oil circuit 2 connects to the upper cavity from one end of the outer shell 1 and to the lower cavity from the other end. The shell has an oil sump 5 in the lower cavity and an exhaust port in the upper cavity.

[0049] A return oil cavity structure 4 is provided at the connection between the external circulation oil circuit 2 and the lower cavity. The return oil cavity structure 4 causes the return oil in the external circulation oil circuit 2 to pass through the return oil cavity structure 4 before flowing back to the oil sump 5. The return oil cavity structure 4 changes the direction and / or speed of the return oil in the external circulation oil circuit 2 into the oil sump 5 and / or allows it to flow into the oil sump 5 from multiple locations.

[0050] The oil return cavity structure 4 is an annular cavity structure formed along the circumference of the shell 1. The annular cavity structure includes:

[0051] The lower cavity 42 has multiple oil outlets 426 on its wall surface to allow oil to flow out.

[0052] Several oil outlets 426 refine the oil flow, enabling multi-directional convergence, reducing disturbance to the oil sump, and thus slowing down the dissolution of oil and gas; the change in the direction of oil flow also reduces the amount of oil and gas flowing directly upward, ultimately reducing the compressor oil circulation rate.

[0053] The upper cavity 41 is disposed on the annular cavity structure. The upper cavity 41 includes a closed part 411 and a semi-closed part 412 that communicates with the lower cavity 42.

[0054] Wherein, the sealing part 411 is at least one sealed cavity;

[0055] The added enclosed cavity can increase the proportion of the return oil cavity 4 in the oil sump 5 to adjust the height of the oil level in the oil sump, which is beneficial to the pumping of oil by the oil pump.

[0056] Increase or decrease the number and / or volume of the closed cavities to adjust the volume occupied by the return oil cavity structure 4 in the oil tank 5, and change the liquid level of the oil tank 5.

[0057] Specifically, the cavity of the enclosed part 411 can occupy a large volume of the oil sump, thereby raising the height of the oil sump inside the compressor, which is more conducive to the oil pump's pumping of oil; while ensuring the same height, the compressor requires less refrigerant oil, thus reducing the use of refrigerant oil.

[0058] There are two closed cavities, including closed cavity A and closed cavity B. Closed cavity A is connected to the semi-closed part 412, and closed cavity B is arranged opposite to closed cavity A. Two gaps are formed between closed cavity B, closed cavity A and semi-closed part 412, so that the bottom of the compression mechanism can be accommodated in the two gaps.

[0059] In use, the combination of closed cavity A and semi-closed part 412 or the combination of closed cavity A and closed cavity B with semi-closed part 412 can be selectively selected to adjust the proportion of closed part 411 in the oil bath.

[0060] The semi-enclosed part 412 is provided with an opening 43 that connects to the external circulation return oil passage 2. The opening can introduce the oil and gas from the external circulation oil passage into the lower cavity 42.

[0061] The semi-enclosed part 412 has a multi-channel structure in the direction of downward flow of oil and gas, so that the oil and gas are diverted into the lower cavity 42 to reduce the impact disturbance when the oil and gas enter.

[0062] The multi-channel structure includes multiple flow channels 4122 vertically separated by wall panels 4121 within the semi-enclosed cavity 412. After entering, oil and gas are diverted into the multiple flow channels 4122 and then enter the lower cavity 42.

[0063] A connecting part is provided between the multi-channel structure and the lower cavity 42. The connecting part includes a partition 422, and the partition 422 has a channel port 423 that can introduce the oil and gas of the multi-channel structure into the lower cavity 42.

[0064] The annular cavity structure is equipped with a flow-damping component to reduce the potential energy of oil and gas flow. The flow-damping component includes a rib plate 425 that divides the lower cavity 42 into several flow-damping chambers and several flow holes 424 formed on the rib plate 425; the rib plate 425 is a reinforcing rib. The number of flow holes 424 on each rib plate 425 is not limited, but preferably three, evenly distributed on the rib plate 425. This ensures the flow of oil and gas while increasing the contact points between the rib plate 425 and the oil and gas, which helps to reduce the potential energy of oil and gas flow and facilitates oil and gas separation upon impact.

[0065] In this process, the oil and gas come into contact with the ribs 425 in several slow-flow chambers and flow to the next slow-flow chamber through the flow holes 424, forming a slow flow and / or oil-gas separation for the introduced oil and gas.

[0066] The center points of several flow holes 424 decrease sequentially along the opening 43 to the oil outlet 426 within the annular cavity structure. This ensures that oil and gas can flow from a high position to a low position.

[0067] To ensure the safety and processability of the five oil return chambers during installation, two installation methods are available.

[0068] like Figure 7 and8 As shown, one requirement is that the following relationship must be satisfied:

[0069] A1>A2, and 0.5×(A1-A2)>5°;

[0070] Where A1 is the first angle of the oil return chamber; A2 is the first angle of the compressor pump body.

[0071] In addition to the above, the following conditions also need to be met: L22=D02-D01=L20+L21,L21>0.2×L22,L25=L26>0.5×L27.

[0072] Wherein, D01 is the minimum inner diameter of the oil return chamber; D02 is the maximum outer diameter of the oil return chamber; L20 is the width of the oil return chamber; L21 is the minimum distance between the first inner wall of the oil return chamber and the pump body; L22 is the minimum distance between the inner wall of the housing and the pump body; L25 is the shortest distance between the semi-enclosed part and the cylinder; L26 is the shortest distance between the closed chamber B and the cylinder; L27 is the width of the cylinder protrusion.

[0073] like Figure 7 and 9 As shown, secondly, if the drive device cannot meet the requirements or is found to be malfunctioning, it can be manually rotated to reach the predetermined position. The following relationship must be satisfied:

[0074] A1>A2, and 0.5×(A1-A2)>5°;

[0075] Where A1 is the first angle of the oil return chamber; A2 is the first angle of the compressor pump body.

[0076] In addition to the above, the following conditions also need to be met: L22=D02-D01=L20+L21,L21>0.2×L22,L23<0.8×L24.

[0077] Wherein, D01 is the minimum inner diameter of the oil return chamber; D02 is the maximum outer diameter of the oil return chamber. L20 is the width of the oil return chamber; L21 is the minimum distance between the first inner wall of the oil return chamber and the pump body; L22 is the minimum distance between the inner wall of the housing and the pump body; L23 is the width of the protrusion in the upper cavity of the oil return chamber; L24 is the minimum distance between the second inner wall of the oil return chamber and the pump body.

[0078] The present invention also provides an air conditioner, including the compressor described above.

[0079] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0080] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0081] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0082] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A compressor, the compressor comprising a housing (1) and an external circulation oil return passage (2) extending outside the housing (1), the housing (1) forming a cavity, the cavity accommodating a drive mechanism and a compression mechanism arranged vertically, the cavity comprising an upper cavity portion located above the drive mechanism and a lower cavity portion located below the compression mechanism; The external circulation return oil passage (2) connects to the upper cavity from one end outside the housing (1) and to the lower cavity from the other end. The housing has an oil sump (5) in the lower cavity and an exhaust port in the upper cavity. The characteristic feature is that... A return oil cavity structure (4) is provided at the connection between the external circulation return oil passage (2) and the lower cavity. The return oil cavity structure (4) causes the return oil in the external circulation return oil passage (2) to pass through the return oil cavity structure (4) before flowing back to the oil sump (5) before flowing back to the oil sump (5). The return oil cavity structure (4) is configured to change the direction and / or speed of the return oil in the external circulation return oil passage (2) entering the oil sump (5) and / or flow into the oil sump (5) from multiple locations. The oil return cavity structure (4) is an annular cavity structure formed circumferentially along the shell (1), and the annular cavity structure includes: The lower cavity (42) has multiple oil outlets (426) on its wall surface to allow oil to flow out. The upper cavity (41) includes a closed part (411) and a semi-closed part (412) communicating with the lower cavity (42); wherein the semi-closed part (412) is provided with an opening (43) communicating with the external circulation return oil passage (2), and the opening can introduce the oil and gas of the external circulation return oil passage into the lower cavity (42); The semi-enclosed part (412) has a vertically separated multi-channel structure in the direction of downward flow of oil and gas.

2. The compressor of claim 1, wherein, The multi-channel structure includes multiple flow channels (4122) vertically separated by a wall panel (4121) inside the semi-enclosed part (412).

3. The compressor of claim 2, wherein, A connection is provided between the multi-channel structure and the lower cavity (42). The connection includes a partition (422) and a channel opening (423) on the partition (422) for introducing the oil and gas of the multi-channel structure into the lower cavity (42).

4. The compressor of claim 3, wherein, The annular cavity structure is provided with a flow-slowing component to reduce the potential energy of oil and gas flow. The flow-slowing component includes a rib plate (425) that divides the lower cavity (42) into several flow-slowing cavities and several flow holes (424) opened on the rib plate (425). In this process, the oil and gas flow along the ribs (425) in several of the slow-flow chambers and through the flow holes (424) to the next slow-flow chamber, forming a slow flow and / or separation of the introduced oil and gas.

5. The compressor of claim 4, wherein, The center points of several of the flow holes (424) decrease sequentially within the annular cavity structure.

6. The compressor of any one of claims 1-5, wherein, The closed part (411) is at least one closed cavity; the number and / or volume of the closed cavities are increased or decreased to adjust the volume of the oil return cavity structure (4) occupied by the oil pool (5) and change the liquid level of the oil pool (5).

7. The compressor of claim 6, wherein, The closed cavity consists of two parts, including closed cavity A and closed cavity B. Closed cavity A is connected to the semi-closed part (412), and closed cavity B is arranged opposite to closed cavity A. Two gaps are formed between closed cavity B, closed cavity A and semi-closed part (412), so that the bottom of the compression mechanism can be accommodated in the two gaps.

8. An air conditioner, characterized in that, A compressor comprising the compressor as claimed in any of claims 1-7.

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